Search results
Results from the WOW.Com Content Network
This constitutes the so-called capsule of the space. Each lacuna is generally occupied by a single cell, but during the division of the cells, it may contain two, four, or eight cells. Lacunae are found between narrow sheets of calcified matrix that are known as lamellae (/ l ə ˈ m ɛ l i / lə-MEL-ee).
Human embryology is the study of this development during the first eight weeks after fertilization. The normal period of gestation (pregnancy) is about nine months or 40 weeks. The germinal stage refers to the time from fertilization through the development of the early embryo until implantation is completed in the uterus .
The allantois (/ ə ˈ l æ n t oʊ ɪ s / a-LAN-toe-iss; [1] pl.: allantoides or allantoises) is a hollow sac-like structure filled with clear fluid that forms part of a developing amniote's conceptus (which consists of all embryonic and extraembryonic tissues).
Von Baer described his laws in his book Über Entwickelungsgeschichte der Thiere.Beobachtung und Reflexion published in 1828. [5] They are a series of statements generally summarised into four points, as translated by Thomas Henry Huxley in his Scientific Memoirs: [6]
The theory of recapitulation, also called the biogenetic law or embryological parallelism—often expressed using Ernst Haeckel's phrase "ontogeny recapitulates phylogeny"—is a historical hypothesis that the development of the embryo of an animal, from fertilization to gestation or hatching (), goes through stages resembling or representing successive adult stages in the evolution of the ...
If you’re stuck on today’s Wordle answer, we’re here to help—but beware of spoilers for Wordle 1243 ahead. Let's start with a few hints.
The initiation of endochondral ossification starts by proliferation and condensation of mesenchymal cells in the area where the bone will eventually be formed. Subsequently, these mesenchymal progenitor cells differentiate into chondroblasts, which actively synthesize cartilage matrix components.
The San Francisco 49ers pulled out a tight 23-20 win over the Tampa Bay Buccaneers, but it came amid rising tensions on the sideline.. 49ers wide receiver Deebo Samuel was seen grabbing the neck ...